|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||501/035 ; 501/036 ; 501/066 ; 65/376 ; 65/454|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 5 인용 특허 : 63|
The glass compositions of the present invention contain at least 2.0 wt % Al.sub.2 O.sub.3 to give resulting glass fiber an acceptable chemical durability for product performance, but no more than 3.0 wt % to ensure the fiber maintains a relatively high biosolubility. The compositions further include relatively high amount of Na.sub.2 O+K.sub.2 O+MgO+CaO, which tends to increase fiber biosolubility and allows for the use of reduced amounts of B.sub.2 O.sub.3 in the composition. The glass compositions have KI values that generally equal or exceed a KI val...
[ What is claimed is:] [1.] A glass fiber composition comprising the following ingredients in weight percent:SiO.sub.2 49-54;Al.sub.2 O.sub.3 2-3;B.sub.2 O.sub.3 5.5-15;Na.sub.2 O 16-22;K.sub.2 O 0-2;MgO greater than 0-8;CaO 7-14; andCaO+MgO>14wherein said composition has a liquidus temperature 300 Poise, exhibits a viscosity of 1000 Poise at a temperature of .ltoreq.1671.degree. F. and satisfies the equation:EQU (B.sub.2 O.sub.3 +Na.sub.2 O+K.sub.2 O+MgO+CaO)-2*Al.sub.2 O.sub.3 .gtoreq.40